When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...

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This is one in a series of shots taken of the sastrugi in the Megadunes area.
Sastrugi are usually just a foot or so high, but the Megadunes camp region had huge formations, over three feet (one meter) tall.
Image Credit: Courtesy Ted Scambos and Rob Bauer, NSIDC
Megadunes Web site